<template>
  <el-container>
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/jiangnan.png" alt="">
        <span>销售管理系统</span>
      </div>
      <el-button type="info" size="mini" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px': '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu :default-active=activePath router :collapse-transition="false" :collapse="isCollapse" unique-opened background-color="#333744"
          text-color="#fff" active-text-color="#409bff">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsList[item.id]"></i>
              <!-- 文本 -->
              <span class="word">{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item @click="saveNavState('/'+subitem.path)" :index="'/'+subitem.path" v-for="subitem in item.children" :key="subitem.id">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{ subitem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 内容主体区域 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单
      menuList: [],
      iconsList: {
        '125': 'iconfont icon-users',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao',
      },
      isCollapse: false,
      activePath:'',
    }
  },

  created() {
    this.getMenuList(),
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push('login');
    },
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      // console.log(res);
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath=activePath
    }
  }
}
</script>

<style lang="less" scoped>
.word{
  padding-left: 20px;
}
.el-menu {
  border-right: 0;
}

.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-left: 0;
  font-size: 20px;
  color: #fff;

  >div {
    display: flex;
    align-items: center;

    >img {
      border-radius: 50%;
    }

    >span {
      margin-left: 20px;
    }
  }

}

.el-aside {
  background-color: #333744;
}

.el-main {
  background-color: #eaedfa;
}

.el-container {
  height: 100%;
}

.toggle-button {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>